The Essence of GDPM

The essence of GDPM is not about slavishly following a process.
It is all about people interaction, gaining consensus and engagement. 'Those
who deliver - do plan the project'
It is also iterative - embedding risks, stakeholder management and other
activities back into the plan to make the milestones more robust. This means
that risks / issues are not managed in isolation but as part of the normal
delivery progress review.

Citation from Nigel C.